src/mesa/pipe/p_inlines.h

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 #ifndef P_INLINES_H
  29 #define P_INLINES_H
  30
  31 #include "p_context.h"
  32 #include "p_winsys.h"
  33
  34
  35 /**
  36  * Set 'ptr' to point to 'region' and update reference counting.
  37  * The old thing pointed to, if any, will be unreferenced first.
  38  * 'region' may be NULL.
  39  */
  40 static INLINE void
  41 pipe_region_reference(struct pipe_region **ptr, struct pipe_region *region)
  42 {
  43    assert(ptr);
  44    if (*ptr) {
  45       /* unreference the old thing */
  46       struct pipe_region *oldReg = *ptr;
  47       assert(oldReg->refcount > 0);
  48       oldReg->refcount--;
  49       if (oldReg->refcount == 0) {
  50          /* free the old region */
  51          assert(oldReg->map_refcount == 0);
  52          /* XXX dereference the region->buffer */
  53          FREE( oldReg );
  54       }
  55       *ptr = NULL;
  56    }
  57    if (region) {
  58       /* reference the new thing */
  59       region->refcount++;
  60       *ptr = region;
  61    }
  62 }
  63
  64 /**
  65  * \sa pipe_region_reference
  66  */
  67 static INLINE void
  68 pipe_surface_reference(struct pipe_surface **ptr, struct pipe_surface *surf)
  69 {
  70    assert(ptr);
  71    if (*ptr) {
  72       struct pipe_winsys *winsys = (*ptr)->winsys;
  73       winsys->surface_release(winsys, ptr);
  74       assert(!*ptr);
  75    }
  76    if (surf) {
  77       /* reference the new thing */
  78       surf->refcount++;
  79       *ptr = surf;
  80    }
  81 }
  82
  83
  84 /**
  85  * \sa pipe_region_reference
  86  */
  87 static INLINE void
  88 pipe_texture_reference(struct pipe_context *pipe, struct pipe_texture **ptr,
  89                        struct pipe_texture *pt)
  90 {
  91    assert(ptr);
  92    if (*ptr) {
  93       pipe->texture_release(pipe, ptr);
  94       assert(!*ptr);
  95    }
  96    if (pt) {
  97       /* reference the new thing */
  98       pt->refcount++;
  99       *ptr = pt;
 100    }
 101 }
 102
 103 #endif /* P_INLINES_H */